Carbureter.



0. B. MONOSMITH. I CARBURETER.

APPLICATION ITILED FEB. 9, 1914.

1,125,368, Patented Jan.19,1915.

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- BETER.

Specification steamers-ream. P t ted Jan, 19 1915,

- Application filed. February a, 1914. U Serial in. strain.

To all tci'zoin it mag concern Be it known that 1, OLNEY B; Mono SMITH,a citizen of the United States, residing at Lora-in, in the county ofLorain and State of Ohio, have invented certain new and usefulImprovements in Carburetors, of which the following is a specification.

This invention relates to carbureters for internal-combustionengines,and more ticularly to improvements in the construc tion of thecarhureter set forth and described in' my co-pending application filedJuly 7, 1913, and having Serial No. 777,637.

The main object of the presentinvention is to provide a carburet ei',which operates substantially on .the sanie principle as my said otherdesign, but is still more simple in construction and will operateeflicien'tly at varying'speeds of the engine without requ iringadjustment.

1 1%. further object of this invention is to p; *ide means, wherebytheWaste heat from the exhaust of the engine may be utilized to Warmsome ofthe air entering the can bureter, or the exhaust gases may be supplieddirectlylthereto Other objectsivill be readily understood as theinvention is hereinafter fully described in connection with theaccompanying drawings, which illustrate a preferred form of the same,and the novel features of the invention \vi'll be. articularl Jointed p1 on in the appended claims.

thedrawings similar characters of reference designate like parts.

Figure 1 is a sectional elevation. of improved-carbureter, Fig. 2 is anend elevation looking toward the float chamber after removing the airtube, Fig. 3 is a plan sec tion View taken'on the line 33 of Fig. 1',Fig. 4 is an elevation of the air tube looking in the direction. of thearrow A. Fig. 1, and Fig. 5 illustrates, on an enlarged'scale, the shapeof the air inlet perforations.

Referring to. the drawings, the air tube is des gnated by 1,, and'dtsupper end is provided with a fiange 2 for securing the sameto theengine. I One Walloit' the air tube,

V as indicated by 3, isprovided with an openso. i i

, edge bein represented by 5 Arranged in ing 4;, which is circular inform, its lowest the air Lu e 1 is an angular shaped separating plateconsisting of a horizontal portion 6 and an inclined upwardly extendingportion 7. The upper surface e the tal portion of saidseparating-platalinement with the edge 5 of" the opening 4. This separating plateextends. the full Width of the in place by brazing,. or other suitablemeans as indicated at 8. The horizontal portion 6 ofsaid separatingplate is providedwith air admitting perforations '9, and the inclinedportion r with 'sim ilar perforations 10.; It will be noticed that theperforations 9 and 10 are larger atthe innersurface of the separatingplate, or in other, words.

at. the opposite side from thedirectionof the air currents enteringtherethrough.

Removably fixed tothe vvall ,3, by screws 11 or in any other suitablemanner, is a flange plate 12, which supports a, float chamber 13, withan intervening compartment 14, arranged between the same and saidflangeplate interposed between the wall tube and the flange plate 12, 11 plateor copper 15 or other suitable packing, whichis out out as shown at 16to form aspace or well, for permitting the gasolene or other volatilefluid to flow from the float chamber, by Way of a conduit 17, to theopening 4 of the airtube. In order to-provide means for changing thesize of the-outlet end of theconduit 17, so that a flow economicallyproportionate to the consumption of gasolene for different kinds orhorse-power of engine may be ob-' tained from astandard or one size ofcarbureter,.a plug 18, having sucha size of opening 19 therethrough {is-Will be foundin practice to give the best results. is removably threadedinto the flange plate 12. The opening 19 in the plugis larger at theoutlet end than at its inner end. Said plug is slotted 20%;: a screwdriver.

For adm tting air to mix with the gasolene from the Well 16, the flangeplate 12 is air tube 1, and may .be secured provided With a plurality ofaperteures "21,

which are located Within the compartment 14 directlv opposite theopening in tlle'air tube. These apertures are also reads larger at theinner surfaceof the plate than at their otherends. Airmav enter the compartment l4 throughan'inlet open ng 22, but preferablv exhaust gas issupplied theremeans of a pipe 23 which leads from the exhaust of the engne, or thepipe 23 may be Wound around the exhaust pipe of the engine andheated air thussupplied. Eor-thepurnose of feeding gasol'ene to the airtube 1 when first-starting the engine. a groovaor cl' anngfi is. cut inthe surface of throttle valve 26 when closed, The outline removablecover 29, and in order lug'32 is a coiled spring of the well 16 isrepresented by a' dotted line 1n Fig. 4. The perforations 9 and 10 inthe separating plate of the air tube, the opening 19 in the apertures 91of the the pin 18, and flange p ate 12, are all preferably made in anangular shape as illustrated in Fig. 5. In all cases, the inlet ends aresmaller than their other ends. It has been found by experiments, thatwhen said openings are formed by a combination of tapering walls 27 and28, a Venturi action is obtained by gas or. liquid entering the smallerends of such openings, which produces even more satisfactory resultsthan when the walls are made with a straight taper. I

The float chamber 13 is provided with a to hold the same in place, alocking finger 30 is employed. This locking finger has a shank 31, whichis slidably mounted in a recess of a lug 32 projecting from the floatchamber. A washer 33 is fixed to the end of said shank, and interposedbetween the same and the 34, which is adapted to retain the lockingfinger in its down'position. When it is desired -to remove the cover,the locking finger may be raised and swung out of. engagement therewith,but

when the finger 'is down; against the upper vouter edge and lower 1nneredge of its" recess, thereby preventing displacement of the cover.

In operation, the engine is started by first slightly opening thethrottle valve 26, which causes the air to rush past the terminusopening 25, therebv creating a vacuum and drawing gasolene from the well1 through the channel 24. As the throttle valve is opened more,thegasolene from the well 16 begins to flow in a thin film over thesurface of the horizontal portion 6 of the separating plate. and the airrushing through the perforations 9 mixes with the same. Furthermore airenters the perforations 10; and air, 1

" out to establish exhaust gases or heated air entering through theapertures 21,'also mix with the gasolene, whereby a verv uniform andefficient mixture is supplied to theengine with the most economicalconsumption of gasolene.

It will be understood that the construction l or arrangement of theparts may be changed,

so long as the same does not depart from the. invention claimed.

Having fully described my invention, what I claim is: V

1. In a carbureter, the combination with an air tube having an openingin its wall, of a flange plate covering the opening, a float chambercarried-by the flange plate, means of communication from the floatChamber to of communication from the being provided scribed.

its shank binds at that side of theedge of saidfopening couimuni c atingwith the float chamber, substantially'ias. described. V

2. Ina carbureter, the-combination with an air tube having an opening inits wall. of a flange plate covering the opening. a'float chambercarried by the flan e plate,'means float chamber to an edge of saidopening, a perforated plate arranged transversely of the'air tube atthat side of the edge of cating with the 'float chamber, and said flangeplate being provided with apertures opposite said opening, substantiallyas described.

3. In. a carbureter, the combination with an air tube having an openingin its wall, of means" for supplying a volatile fluid to an edge of theopening, a'plate arranged in the air tube at that side of the ed e ofsaid opening supplied with volatile fluid, the plate perfora'tions'beinglarger at the side of the plate adjacent the edge of said opening supplied withv olatile fluid, substantially as de- 4. In a carbureter, thecombination'with an air tube having an opening in its wall, of a flangeplate covering the opening, a float chamber carried by the flan e plate,means of communication from the oat chamber to an edge of said opening,a perforated plate arranged transversely of the air tube at that side ofthe edge of said opening communieating with the float chamber, saidflange plate being provided with apertures opposite said opening, andthe apertures-being larger at their inner ends, substantially asdescribed.

5. In a carbureter, the combination ofa vertical air tube, the air tubehaving an opening through its wall,;- a flange plate fixed to the airtube and covering the open-- ing, a float chamber carried by'th'e flangepla te. a sheet of material interposed between said flange plate andsaid air tube, a conduit from the float chamber, said sheet being cutcommunication from the conduit to the lower edge of said opening, and aperforated plate arranged trans versely f said air tube below; saidopening, substantially as described.

6. In a carbureter, the combination of a vertical air tube, the air tubehaving an opening through its wall, a flange plate fixed to the air tubeand covering the opening. a floatchamber carried'by the flange plate, asheet of materialinterposed between said flange plate. and saidair tube,a conduit from the float chamber; said sheet being cut out to establishcommunication from the conduit to the lo'wer'edge of said opening, .ap1ug,;:{the having a. tapering hollow said opening communi-' withperforations. and the T center in alinement with the conduit. theoutletof the plugbeing the larger, and a perforated ;.plate arrangedtransversely of said air tubebelow said opemng,'substan "tiallyasdes'cribed.

i. In a carbureter, the combination of a vertical air tube,the air tubehaving an opening through its wall, a flange plate fixed to the air'tubeand covering the opening, afloat chamber carried by the flangeplate, a

sheet of'material interposed between said "flange plate and said airtube, a conduit from the float chamber, said sheet being out out toestablish communication from the conduit to the lower edge of saidopening, said flange plate being provided with apertures opposite saidopening, the apertures being larger at their inner .ends,.a platearranged transversely of the air tube below i saidopening, th'e'platebeing provided with verselv of said ai'rtube'below said opening,

said flange plate being provided with apertures opposite said opening,and means whereby heated air is conveyed to said apertures.,substantially as described.

9. ln acarbureter, the combination of a vertical air tube, the air tubehaving-an opening through its Wall, a flange plate fixed te the air tubeand covering the opening, a floatv chamber carried by the flange plate,

' a sheet of material interposed between said flange plate and saidair'tube. a conduit from the float chamber, said sheet being out out toestablish communication from the conduit to thelower edgeof saidopening, avpe'rforated plate arranged transversely of said air tubebelow said opening, said flange plate being provided with aperturesopposite said opening,-.a compartment covering said' apertures, andmeans for conveying exhaust gases from the engine to the coinpartinent,substantially as described.

10. In a carbureter, the combination verticalair tube, the air tubehaving an opening through its wall, a flange. plate fixed to the airtube and covering the opening, a float chamber carried by the flangeplate, a sheet of material interposed between said flange plate and saidair tube, a conduit from the floatchamber, said sheet being cut out toestablish communication from the conduit to the lower edge of saidopening, a perforated plate arranged-transversely of said air tube belowsaid opening, and the perforations being larger at the upper side of theplate-and consisting of a combination of tapering and more taperingwalls, substantially as described.

11. In a carbureter, the combination of a vertical air tube, the airtube having an o ening through its wall, a flange platefixed to the airtube and covering the opening, a float chamber carried by the flangeplate, a sheet of material interposed between said flange plate and saidair tube, a conduit from the float-chamber,.said sheet being cutout toestablish communication fromthe conduit to the lower edge of said opening, a separating plate consisting of a horizontal and inclined portionarranged in the air tube, the horizontal portion of the separating platebeing below said opening, the

separating plate being perforated, and the perforations being larger atthe inner surf faces of the horizontal and inclined portions,substantially as-described.

12. In a carbureter, the combination of a vertical air tube, the airtube having an.

opening through its wall, a flange plate fixed to the air tube andcovering the opening, afloat-chamber carried. by the flange plate,asheet of material interposed between said flange plate and saidair-tube, a conduit from the float chamber, said sheet being cut out toestablish communication from the conduit to the lower edge of said'open-'ing, a perforated plate arranged transversely by said air-tubebelow'said opening, a throttle valve in the air tube above theperforated plate, and the air tubebeing provided with a groove'leadingfrom the cut out portion. of said sheet to a point above the throttlevalve when in closed position, substantia lly as described;

In testimonv whereof I aifix my signature in presence of two witnesses 11' OLNEY .B. MQNOSMITH. Witnesses: I

W. F. PARRY,

W. Hansen.

